THE COMPANIES ALREADY WORKING WITH QSD
Developing startups with global businesses of all shapes and sizes since 2010.
Quality is a Product of Love
Creating apps that transform brands, grow businesses and make people’s lives better
We offer a non-exhaustive list of our skills
- Android & iOS (iPhone, iPad) development using Java, Kotlin & Swift
- Hybrid development (React Native, KMM,...)
- PHP development (Laravel, CodeIgniter, CakePHP, Symfony...)
- Backend & API (JavaScript, Node.JS, Python, Ruby, Nest & Flask)
- Frontend (React.JS, Vue.JS & Angular)
- Graphic Design - Mobile UX
- Project Lead and Management
- Tech Support
What you get
By choosing us, you get top-notch iOS or Android app at a competitive price that will help you optimize your processes, engage your customers, and achieve more profit.
Let our dedicated team take responsibility for covering the complete tech side of the project
our services
Delivering end-to-end software products, from prototyping to design, development, and post-launch support and maintenance.
1
Native & Cross-platform App Development
If you need to build an app from scratch or fix the existing code, we'll assist you every step of the way. We deliver great quality of the code together with a well-thought app architecture that allows you to scale up as the project grows.
2
Backend/API
There are backends and QSD-made backends. There are APIs and QSD-made APIs. Once you have seen our API and 1ms response, you will be asking yourself if this is really possible. Strong structure and a well-written code at the core make powerful and scalable apps.
3
QA & App Testing
At QSD, Quality is everyone's responsibility. However, sometimes you just need to keep calm and trust the QA manager. Doing Quality Assurance from the beginning of your product's journey leads to an efficient process in terms of money, time, and effort.
4
Customer Support
We strongly believe that application support should be done by the same team that created an app. Understanding the customer's point of view before offering a solution is the proper way of providing effective customer service problem-solving.
5
UX Design
Attractive, functional, easy to use, and delightful to interact with – this is a design that works and drives business results. Creating the best user experience for any screen size regardless of the device is one of our superpowers. Give us a try!
6
Project Lead
Having a group of people with different expertise working toward a common goal makes us handle every project, regardless its complexity. When energy, knowledge, skills, and passion collide within a team, we can accomplish anything we set our minds to.
1
Native & Cross-platform App Development
If you need to build an app from scratch or fix the existing code, we'll assist you every step of the way. We deliver great quality of the code together with a well-thought app architecture that allows you to scale up as the project grows.
2
Backend/API
There are backends and QSD-made backends. There are APIs and QSD-made APIs. Once you have seen our API and 1ms response, you will be asking yourself if this is possible. Strong structure and a well-written code at the core make powerful and scalable apps.
3
QA & App Testing
At QSD, Quality is everyone's responsibility. However, sometimes you just need to keep calm and trust the QA manager. Doing Quality Assurance from the beginning of your product's journey leads to an efficient process in terms of money, time, and effort.
4
Customer Support
We strongly believe that application support should be done by the same team that created an app. Understanding the customer's point of view before offering a solution is the proper way of providing effective customer service problem-solving.
5
UX Design
Attractive, functional, easy to use, and delightful to interact with – this is a design that works and drives business results.
Creating the best user experience for any screen size regardless of the device is one of our superpowers.
Give us a try!
6
Project Lead
Having a group of people with different expertise working toward a common goal makes us handle every project, regardless its complexity. When energy, knowledge, skills, and passion collide within a team, we can accomplish anything we set our minds to.
Have a specification for an app?
Start working on your app right away!
Our team takes the whole mobile app development process off your shoulders, which allows you to pay more attention to business development. Share your specific requirements and get an approximate estimate within a week.
Have a specification for an app?
Start working on your app right away!
Our team takes the whole mobile app development process off your shoulders, which allows you to pay more attention to business development. Share your specific requirements and get an approximate estimate within a week.
CASE STUDIES
Work with a world-class agile team that creates top-notch digital products on time & within budget.
Jaumo
With more than 40 million users worldwide, Jaumo has established itself as one of the best dating sites in the world. QSD is extremely proud to be part of the Jaumo Android and iOS teams since 2015.
Jaumo
With more than 40 million users worldwide, Jaumo has established itself as one of the best dating sites in the world. QSD is extremely proud to be part of the Jaumo Android and iOS teams since 2015.
Jaumo
With more than 40 million users worldwide, Jaumo has established itself as one of the best dating sites in the world. QSD is extremely proud to be part of the Jaumo Android and iOS teams since 2015.
The Wonder Weeks
The worldwide #1 Bestselling baby app holds no.1 position on App Store and Play Store with millions of active users. We took care of all aspects of mobile apps and helped with web application development, tech support, business planning, copyright hunt, and more.
The Wonder Weeks
The worldwide #1 Bestselling baby app which holds no.1 position on App Store and Play Store with millions of active users. We took care of all aspects of mobile apps and helped with web application development, tech support, business planning, copyright hunt, and more.
The Wonder Weeks
The worldwide #1 Bestselling baby app which holds no.1 position on App Store and Play Store with millions of active users. We took care of all aspects of mobile apps and helped with web application development, tech support, business planning, copyright hunt, and more.
Ukulele tuner, tabs & chords
The largest source of ukulele tabs and chords in the world. Thousands of uke players trust us and contribute to our app. Learn to play your favorite songs anywhere, anytime. Get the most downloaded uke app on the planet!
PubNub
With over 330 million devices and streams, it is the world’s largest realtime communication platform and realtime infrastructure-as-a-service (IaaS) provider. Our team takes the whole mobile app development process off your shoulders, which allows you to pay more attention to business development.
PubNub
With over 330 million devices and streams, it is the world’s largest realtime communication platform and realtime infrastructure-as-a-service (IaaS) provider. Our team takes the whole mobile app development process off your shoulders, which allows you to pay more attention to business development.
PubNub
With over 330 million devices and streams, it is the world’s largest realtime communication platform and realtime infrastructure-as-a-service (IaaS) provider. Our team takes the whole mobile app development process off your shoulders, which allows you to pay more attention to business development.
What our clients have to say about us
"I have been extremely impressed with QSD from the first day. They are the utmost professionals and gurus of their field. We got not only contractors, but also friends who equally shared our passion for our brand. I have to be honest that I often felt like these guys are the brand owners, not only contractors.
Marco PDomTec BV, Netherlands 
"We chose this team as we are top contributors on the Play Store and we knew that we cannot afford any risk. We got a highly trained team that was able to maintain our robust infrastructure and our demanding users. We were blessed to find this team. Try them and let me know if we were wrong!"
Benjamin & JensJaumo 
"I love QSD. Absolutely amazing results and experience creating our website and mobile applications. We chose this small company to help us create Internet and mobile identity for our new product. We got way more than we expected. You will not regret if you choose this team for your project!"
Christoph BVictorinox 
FREQUENTLY ASKED QUESTIONS
How much does it cost to develop a mobile app?
Many factors can influence the actual total cost of mobile app development, such as the number of platforms supported, the complexity of the app, number of features, its visual design and user interface, as well as the entire backend infrastructure that goes into creating the functionality of the mobile app.
Click here to get a quick overview of an average monthly hours and costs for the basic team setup at QSD (medium-complexity app).
How does Mobile App Development process look like?
Our development process consists of 7 crucial stages:
1. Project requirements
2. Wireframing
3. Kick-off
4. Design & Development
5. Quality Assurance
6. Deployment & Launch
7. Maintenance & Support
See more about each stage of mobile app development at QSD here.
What are some of the top projects developed by you?
How would you structure the development team?
The following calculation is a quick overview of an average monthly hours total for the basic team setup at QSD. We assume that the month consists of 4 one-week sprints. A developer works about 7 hours per day, so about 140 hours per month. The monthly amount of payable hours of a Scrum Master is usually 15% of monthly hours logged by developers.
2 Developers (1 per platform) = 2 x 35h x 4 weeks = 280h per month
1 Scrum Master = 15% x 280h = 42h per month
1 Quality Assurance Engineer for medium-complexity app = 80h per month
By starting with an MVP (Minimum Viable Product), you get to build a successful product without investing a lot of money into a high-risk project, therefore hiring a smaller team. When you're satisfied with the results, it's time to scale up and invest. You involve more specialists for the later stages of development. Thus, the rules set at the beginning may evolve as the project is developing and the environment is changing. We understand this and rapidly adapt to the current conditions and your requirements. Thanks to our clear division of tasks and efficient communication, you also get solid support in risk management at every stage of development.
Do you sign an NDA with clients if they want to keep their mobile app idea and other project information confidential?
We do sign an NDA (Non-Disclosure Agreement) whenever the client requires it.
All the sensitive information about the project we may obtain will not be made available to any others.
Do your clients have ownership over the code of their mobile application?
If the entrepreneur hires us to code the app, ownership is relatively straightforward. The source code would be a work made for hire, and the entrepreneur's company owns the Intellectual Property rights.